Yes, use the brake pedal to bring the pads out to make contact with the discs and hold, then operate the handbrake a few times firmly, you might need to take the car for a run to use the brakes a bit before you get a "good handbrake". Also if you have been living with a "bad or high handbrake" before doing this work, you might have adjusted the handbrake cable, if so, slacken the handbrake cable off and leave like that until the handbrake operation has optimised, then adjust the handbrake to lower the "handle" if necessary without causing grabbing/rubbing when off - you should just have slight clearance between the calliper levers and the end stops - though I tend to be generous and let the lever just rest on the end stops.